Sustainable Fertilizer Level for Winter Wheat in Different Rainfall Regions on the Loess Plateau of China

Higher fertilization on winter wheat increased the fluctuation of winter wheat yield in different rainfall years and impacted the sustainable development of winter wheat production on the Loess Plateau. Based on the long term field experimental data at Chagnwu Agricultural Station, this paper evaluated the EPIC model. And this paper also suggested a sustainable fertilizer level for winter wheat, based on the analysis of simulation results in different rainfall regions. Results of this study indicated that: 1) The EPIC model simulated both winter wheat yields and soil water among different fertilizer levels well, with the mean R value of 0.91 and 0.89 respectively. 2) With the increasing of fertilizer, the value of IRFG (Increase Rate of Grain yield by Fertilizer) and WUEG (Water Using Rfficiency for Grain yield) became higher, when soil water in deep soil was not be used excessively; however, the value of IRFG became lower, when soil water in deep soil was used excessively. 3) In the semi-humid region, fertilizer for winter wheat should be from N4 to N5; in the semi-humid and drought-prone region and in the semi-arid region, it should be from N3 to N4; in the semi-arid and drought-prone region, it should be lower than N3.

[1]  H. M. Taylor,et al.  An assessment of the core-break method for estimating rooting density of different crops in the field , 1987 .

[2]  Ghulam Hussain,et al.  Effect of irrigation and nitrogen on water use efficiency of wheat in Saudi Arabia , 1995 .

[3]  John R. Williams,et al.  The EPIC crop growth model , 1989 .

[4]  J. T. Ritchie,et al.  Soil and plant factors affecting evaporation. , 1990 .

[5]  James W. Jones,et al.  The DSSAT cropping system model , 2003 .

[6]  N. Eash,et al.  Significance of Ancient Agricultural Soils for Long‐Term Agronomic Studies and Sustainable Agriculture Research , 1991 .

[7]  Marija J. Norusis,et al.  SPSS for Windows Base System User''s Guide , 1992 .

[8]  John R. Williams,et al.  EPIC-erosion/productivity impact calculator: 1. Model documentation. , 1990 .

[9]  V. Singh,et al.  The EPIC model. , 1995 .

[10]  V. Singh,et al.  Computer Models of Watershed Hydrology , 1995 .

[11]  David C. Nielsen,et al.  Nitrogen Fertility Influence on Water Stress and Yield of Winter Wheat , 1991 .

[12]  Jimmy R. Williams,et al.  Simulating soil C dynamics with EPIC: Model description and testing against long-term data , 2006 .

[13]  K. H. Hartge,et al.  Bulk Density , 2018, SSSA Book Series.

[14]  Jun Li,et al.  Evaluation of crop yield and soil water estimates using the EPIC model for the Loess Plateau of China , 2010, Math. Comput. Model..

[15]  John R. Williams,et al.  A modeling approach to determining the relationship between erosion and soil productivity [EPIC, Erosion-Productivity Impact Calculator, mathematical models] , 1984 .

[16]  Giovanni Piccinni,et al.  Using EPIC model to manage irrigated cotton and maize , 2009 .

[17]  Roberta A. Brown,et al.  Sensitivity of crop yield and water use to change in a range of climatic factors and CO2 concentrations: a simulation study applying EPIC to the central USA , 1997 .

[18]  Andrew N. Sharpley,et al.  EPIC, Erosion/Productivity Impact Calculator , 1990 .

[19]  Paul L. Brown,et al.  Water Use and Soil Water Depletion by Dryland Winter Wheat as Affected by Nitrogen Fertilization1 , 1971 .

[20]  D. R. Cameron,et al.  FACTORS AFFECTING FERTILIZER RESPONSE OF WHEAT IN SOUTHWESTERN SASKATCHEWAN , 1982 .

[21]  Li You-jun.  Water Restoration of Dry Soil Layers in the Loess Plateau and Crop Yield Response , 2007 .

[22]  J. R. Brown,et al.  Overview of long-term agronomic research , 1991 .

[23]  Wang Xue,et al.  Simulation of yield and soil desiccation effects of continuous spring maize in different precipitation areas of the Loess Plateau , 2009 .

[24]  Linda O. Mearns,et al.  Reliability and input-data induced uncertainty of the EPIC model to estimate climate change impact on sorghum yields in the U.S. Great Plains , 2009 .

[25]  Mingde Hao,et al.  Sustainable recovery of soil desiccation in semi-humid region on the Loess Plateau , 2011 .

[26]  Jacques Gallichand,et al.  Effect of increased fertilizer applications to wheat crop on soil-water depletion in the Loess Plateau, China , 2003 .